Improvement in head-blocks of saw-mills



2 SheetsfSheet 1.

P. J. STALEY.

BLAD BLOCK 0F SAW MILLS.

1\Io.98,215.Y Patented Deo. 21, 1869.4

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2 Sheets-Sheet 2.

F. J. STALEY.

HELD BLOCK OPSAW MILLS. No. 98,215. Patented 1360.21, 1869'.

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FRANKLIN J. STALEY, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO HIMSELE'GEORGEGEORGE H. CARTER, OF SAME PLACE.

W. JOSEPH, lsAAo s. LONG, AND

Letters Patent No. 98,215, dated .December 21, 1869.

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' IMPRovEMENT IN HEAD-BLocKs or SAW-MILLS.

The. Schedule referred to in these Letters Patent and making -Iart Ofthe same.

I, FRANKLIN J. STALEY, of Indianapolis, in the county of Marion, andState of Indiana, have invented p certain Improvements in Head-Blocksfor Saw-Mills,

of which the following is a specification.

Nature and Objects of the Invention.

My invention relates to construction and arrangement of the deviceatt-ached to and constituting part of the head-blocks of saw-mills,combined with the longitudinal setting-shaft usually employed foroperating the knees, and a ratchet-wheel and lever and series ot pawlsarranged to actuate the setting-shaft, in such a manner that both kneesmay be moved simultaneously toward the saw, as in sawing lumber ,ofequal thickness, and so that either knee may be moved toward the sawwhile the other remains at rest, as in sawing tapering lumber, or logsthat are larger at one end than the other and also so that the knees maybe moved vin like manner quickly backward or from the saw into positionto receive anotherlog, the object being to have a more complete andready control over the movement of the knees, for the purpose of settingthe log, .than heretofore.

Description of the Accompanying Drawings. Figure l is an elevation of alog-carriage andheadblocks embodying my invention.

Figure 2 is a plan view of the same. Figure 3 is a detail verticallongitudinal section of lthe device attached to and forminggpart of theheadbloeks for actuating the knees.

Figure 4 is a transverse section of the same, showing the inside of 011eofthe anges with the pawl and spring attached.

Figure 5 is an exterior view of one'of the flanges.

General Description..

A is the log-carriage, made and operated in the usual manner.

I5, the head-blocks, furnished with knees O, in the usual manner.

The device for operating the knees to set the log consists of thelongitudinal setting-shaft D, which passes through a sleeve, E, littingneatly but working freely. therein, and having collars F ou the ends,one of which is made permanent andthe other to screw on so as to"beremovable.

Keys e e pass through the sleeve, the inner ends projecting into akey-seat cut the entire length of the shaft. These keys prevent thesleeve and collars from ,turning on the shaft, and at the same time areso arranged as toallonE-the position of the head-blocks to be fehang'edalongethe log-carriage, to adapt it to logs of "different lengths, atpleasure. A

Surrounding the sleeve E is a casting, G, that fits neatly and worksfreely thereon. The casting G has v.coge i'arouud its centre, that gearwith cogs on the 'under side of the knees. The outer' ends of casting Gare furnished with ratchet-cogs o, and between the ratchet-wheels andthe centre .cogs are the' bearings e', in the sides of the head-blocks.

s s', fig. 2, are pawls pivoted to Ithe collars F, that engage with theratchets o, the latter being arranged to work in opposite directions,the one on the left-opu eratin g to move the knees from the saw, andthat on the right moving them toward the saw. F

The setting-shaft D is operated by double parvis, H

o on that end of the casting G, and rotating the oeufv tre cogs t,'tomove the knees toward the saw.

The pawls H and I are made iu'pairs, one of which in each pair is madehalf the length of a tooth shorter than the/other.

By this arrangement the teeth in ratchet-wheel K l can be made doublethe size that would otherwise be required, thereby securing greaterstrength and durability of the teeth. v

The movement of the lever -J is regulated by a pin inserted in the holesR, in the segmental guides Q,

which are so arranged, in combination with the double pawls 1I andI, andratchet-wheel K, as to regulate the movement of the knees to any desiredfraction of' an inch, the advantage of which will be readily appreciatedby the users of saw-mills.

By disengaging the pawl s', on the right of either of the head-blocks,and then operating theA lever J, l

the ratchets o and cogs t will not be turned, and hence the knees of lthat block will remain motionless, while the knee of the otherhead-block will bexmoved toward the saw as usual, thus enabling me toset the log to anyl required angle to` the saw, as may be required insawing tapering lumber, or logsl that are larger at one end than at theother. y

By diseugaging the bevel-wheel M, the shaft D may be turned Aby the handcrank-wheel P, and theknees be thus moved quicklyinto position toreceive another log, orfor other purposes.

The kneeslnay also be moved back from the saw by hand, by disengagingthe pawl s', on the right of the head-blocks.-

I claim, as my invention- 1. The sleeve E, furnished with the flanges Fand v pawls s s and keys e e, concentric piece E, furnished with cogs iand ratchetrso, in combination 'with the Settingeshafb D, 'furnsiie'with the hand crank-wheel P andknees C, all constructed and arrangedsubstantally as and for the purpose set forth.

2. The mtcliebwheel K, lever J, pznvis H and I, arranged in pairs, asdescribed, in eombinntion'wt-h bevel-wheels L and M, setting-shaft D,and the device described, for operating the arranged substantially asknees C, constructed and and for the purpose set 3. The segmental archQ, lever J, pawls H I, ratchet K, and gearsL and M, when n.11 the-pnrtsare constructed and arranged ns herein specified, rand for the purposeset forth.

FRANKLIN J.. STALEY.

Witnesses: y

O. F. MAYHEW, J. MORRIsoN.

